Window ventilator



March 10. 1925.

' T. J., CHAPPELL WINDOW VENTILA'IOR Filed Sept. 13

Patented Mar. 10, 1925.

1,529,513 UNITED STATES PATENT OFFICE. I

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Application fled September 13, 1,923. Serial ll'o. 682,471.

To allwhomz'tmwy concern:

Be it known that I, THOMAS J. GnArrELL, a citizen of the- United States, reslding at Montpelier, in the county of Stutsman and State of North Dakota, have invented certain new and useful Improvements in Window Ventilators; and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the artuto which it appertains to make and use the same.

The object of this invention is to provide a Ventilator suitable for use in Windows or doors, under substantially all weather conditions, and one which will close under strong wind pressure. I

A further object is to provide means for mounting and connecting a plurality of vanes so that after being closed by excessive air pressure they will be on the reduction of the air pressure, automatically opened and the device will continue to function indefinitely as a ventilator, without attention on the part of the individuals using it.

A still further object is to prevent the entrance of rain or snow when the wind pressure is light and the vanes remain open.

A still further object is to provide a de vice of this type which shall include a plurality of vanes pivotally mounted and connected by a controlling rod and a spring,

. the vanes being normally openvand being each provided with deflected portions on opposite edges thereof for preventing the entranceof water.

With the above and other objects in view,

. the invention consists in the construction,-

combination and arrangement of parts here- ."inafter fully described, claimed and illustrated in the wherein:

Figure 1 is a view in side elevation of a window ventilator constructed in accordance with my invention;

Figure 2 is a sectional view taken on the vertical plane indicated by the line 22 of Figure 1;

Figure 3 is a sectional view taken on the accompanying drawing,

horizontal plane indicated by the line 3---3 of Figure 1, and

Figure 4 is a sectional view taken on thevertical plane indicated by the line 4--4 of Figure 3.

The ventilator shown comprises a substantially rectangular frame including side members 10 and 11, of the form shown,

to engage the inner side of the bottom rail.

of the window sash B.

Vanes 14 are swung between the frame members 10 and 11 upon horizontal axes 15,

and they extend downwardly a-nd outwardly from their pivots. upwardly curved edge 16 and an outwardly and downwardly deflected edge 17. Each edge 17 is opposlte the curved portion 16 of the adjacent vane, and this construction prevents the entrance of rain, snow and sleet when the vanes are opened. The elements 17 also provide stiffening ribs and act as drips. A screen panel 18 is secured to the outer side of the frame in any suitable manner, and it acts as a wind breaker, and a driving rain is broken up into spray upon striking the screen.

The vanes 14 are yieldingly supported in fully opened position by means preferably Each vane has an inner consisting of rod 20 pivoted thereto as at.

20 and springs 21 .connected to the frame member 13 and .to inwardly directed arms 21 carried by the rods. The fully opened and closed positions of the vanes 14 are shown by solid and dotted lines, respectively, in Figure 2 of the drawin When they are in fully opened or partially opened position, the vanes 14 extend downwardly the air against the vanes 14 tends to swing" them downwardly into closed position against the tension of the springs 21. The

springs 21 are of such tension that they will hold the vanes 14 in fully opened position under and during a predetermined air pressure thereon. Whenever the air pressure on the vanes 14 is greater than the minimum and less than the maximumtension of the springs 21, the vanes will occupy a partly opened position, and whenever the air pressure on the vanes is greater than the maximum tension of the springs the vanes will occupy a closed position.

In order to permit the ventilator to be inserted in the window frame, the frame member 11 is constructed of telescoping sections 11 and 11 as clearly shown in Figure 3 of the drawing. The section 11* 1S fixed to the frame, and section 11 is connected to the section 11 for inward and upward movements 'with respect thereto by loops 11 which are pivotally connected to the respective sections by elements 11. To permit the section 11 to be moved upwardl and inwardly with respect to the section 11 and thus shorten the ventilator so as to permit the frame member 10 to be inserted in one of the sash grooves of the window frame, a finger loop 11 is'pivoted to the upper end of the section 11. After the ventilator has been positioned upon the Window sill' A with the frame member 10 oocupying one of the sash grooves C, the section 11 of the frame member ll'is moved or forced downwardly with the result that it is directed into the other sash groove C, after which the sash B is lowered into engagement with the frame member 13 and its flange 13.

From the foregolng description, taken inconnection with the accompanying drawing, it should be apparent that the ventilator is simple and durable, that it may be manufactured and sold at a comparatively low cost, and that it may be easily and readily mounted into position for use, and that it will automatically function to prevent the entrance intodaioom or other structurev being ventilated of a large volume of air, and therebyprevent the lowering of the temperature of the room or structure below a predetermined degree. Springs of different tensions may be used depending solely upon the air pressure at 'which it is desired that the ventilator automatically close, and owing thereto the ventilator is well adapted for use in connection with small and large structures. If preferred only. 0110 rod 20-,a'nd one spring 21 may be employed. The means for yieldingly supporting the vanes 14 in fully opened position may vary materially from that shown in the drawing, and it is intended to employ for this purpose any means that will support the vanes 14 in fully opened position during and under a wind pressure of a predetermined degree, permit them to partly close on a slight increase in the wind pressure and permit them to fully close on a greater degree of wind pressure.

What is claimed is: v a

1. A ventilator for disposition in the sash grooves of a Window, said ventilator at one side having a section, and means pivotally connecting said section to the ventilator for movement relatively thereto and into parallelism therewith to facilitate insertion and removal from the adjacent sash groove, thef to the vanes a spring connected to said rod frame to normally maintain the v and to the vanes in an upwardly and rearwardly inclined position,- said vanes being adapted to close against each other against the tension of said spring through excessive air pressure, the forward ends of the vanes extending downwardly, and the rear ends of the vanes extending upwardly, said frame having flanges at one side thereof, a section of said side overlapped by said flanges, and links pivotally connecting the section to the ventilator located within said flanges and permitting the section to be moved relatively to the'ventilator and in parallelism with the adjacent side thereof. In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS J. OHAP ELL. 

